1000 yard 308

[Zak Smith]

Figure out its terminal velocity at 1000 yards and that might be a good start.

 

[M.O.A.]

well its right at 1265 whats wrong with that

 

[M.O.A.]

a 178 is at 1213

 

[Zak Smith]

1200 fps is generally considered the breakover point for bullets that have unpredictable behavior in the trans-sonic regime. The 168 SMK if you run it right, will be right around there, or slower, at 1000 yards near sea level. When I run the same numbers for a 175 SMK or 155 Lapua, they are over 1260, or closer to 1300.

From personal experience, when I shot the 168 SMK (FGMM factory), I had a really hard time hitting targets consistently at 800. When I switched bullets, no problems out to 1000+

 

[M.O.A.]

ok i think i got it . so if you can keep the 168s over 1200fps at 1000 they will still work

 

[Zak Smith]

There are a lot of people who report bad experience with 168 SMK at 1000, or 800+. You could try to make it work, or you could just use a bullet/load that is known to work at 1000.

 

[M.O.A.]

cool thanks for the insight

 

[Beentown71]

Thanks for the info Zak! I was wondering what the problem was...at 800 yards I was doing better than 9.5" spread but at 1000 I couldn't hit with any accuracy at all on a 20"x20" plate.

Beentown